Question

Or
There is a circular path of width 2m along the boundary and
inside a circular park of radius 16m. Find the cost of paving the
path with bricks at the rate of RS 24 per m [use 17 = 3.14)
6​

Answer 1

Answer:

area of bigger circle

$= 2\pi {18}^{2} = 2\pi324 = 648\pi$

area os smaller circle

$= 2\pi {16}^{2} = 2\pi256 = 512\pi$

area of path =

$648\pi - 512\pi = 136\pi$

cost=rate×area

$136\pi \times 24 \\ 136 \times 3.14 \times 24 \\ = rs10248(aprox)$

Answer 2

Refer the above picture.